The Slender System is doctor formulated and designed to improve energy and combat food cravings. A high-quality vegetarian supplement recommended by Dr. Colbert for increasing energy and burning fat. Active ingredients include green tea extract, yerba mate, and vitamin B12. Slender Formula does not contain any yeast, gluten, soy, dairy, corn, sodium, sugar, or starch. It is also free of any artificial colorings, preservatives, or flavorings.